Record Display for the EPA National Library Catalog


Main Title Variation in Elemental Content of Lettuce Grown Under Base-Line Conditions in Five Controlled-Environment Facilities.
Author Berry, Wade L. ; Krizek, Donald T. ; Ormrod, Douglas P. ; McFarlane, James C. ; Langhans, Robert W. ;
CORP Author American Society for Horticultural Science, Mount Vernon, VA. Growth Chamber Committee.;Environmental Protection Agency, Washington, DC.
Year Published 1982
Report Number EPA-600/J-81-561;
Stock Number PB82-224171
Additional Subjects Growth ; Nutrients ; Lettuce ; Concentration(Composition) ; Plant tissues ; Phosphorus ; Potassium ; Calcium ; Metals ; Emission spectroscopy ; Comparison ; Analysis of variance ; Chemical analysis ; Laboratories ; Water pollution ; Reprints ;
Library Call Number Additional Info Location Last
NTIS  PB82-224171 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 8p
An interlaboratory comparison was made of the variation in elemental concentration of leaf lettuce (Lactuca sativa) plants grown under base-line conditions for 28 days in 5 controlled-environment facilities. Two studies were conducted by each of 5 investigators using a sphagnum peat-vermiculite mix obtained from a common source. Plant tissue from all studies was collected and analyzed at 1 laboratory for 10 essential elements (P, K, Ca, Mg, Fe, Mn, B, Zn, Cu, Mo) and 10 non-essential elements (Al, Si, Ti, Sr, Ba, Na, Pb, V, Li, and Sn) by arc emission spectrography. The 10 essential elements occurred at concentrations adequate for normal lettuce growth.